I have a similar setup and I use a Connect wire to a tape loop on the receiver. I use the receiver for films direct to my speakers, I also have other hifi components and a PC wires to the receiver. So my tape out is wires to the Connect line in, the Connect line out is wires to the tape line in. If I select Tape on my receiver I listen to whatever Sonos is streaming, or I can select TV, or PC etc on the amp to listen to that. I can also go into the Sonos app and stream from the line in on the Connect, so I can listen to stuff from the TV or PC or other hifi component on any other zone.
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